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| Pumps of Oklahoma Provider of groundwater monitoring and remediation supplies. | |
| Westbay Instruments Designer of instrumentation systems for investigating and monitoring groundwater conditions. | ||
| Infiltrator Systems Manufacturer of plastic drainage chambers for on-site septic and stormwater management. | ||
| K-V Associates Manufacturer and seller of remediation, monitoring and sampling equipment for groundwater and soils. | ||
| Stormceptor Manufacturer of stormwater separators for water and wastewater treatment. | ||
| DMLS Distributor of passive, multilayer samplers for groundwater testing. | ||
| Heron Instruments Provider of portable groundwater monitoring instrumentation. | ||
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